.sec-3 .left{float: left;width: 400px;height: 600px;overflow-y: scroll;}
.sec-3 .right{float: right;width: 400px;height: 600px;overflow-y: scroll;}
.sec-3 img{width: 100%;height: initial;max-height: none;max-width: none;}

.sec-4-2 img{width: 300px;height: 140px}
.sec-4-4 .left{float: left;width: 400px;}
.sec-4-4 .right{float: right;width: 400px;}
::-webkit-scrollbar{width:16px;height:16px;background-color:#F5F5F5}
::-webkit-scrollbar-track{box-shadow:inset 0 0 6px rgba(23,201,158,.3);-webkit-box-shadow:inset 0 0 6px rgba(23,201,158,.3);border-radius:10px}
::-webkit-scrollbar-thumb{border-radius:10px;box-shadow:inset 0 0 6px rgba(23,201,158,.5);-webkit-box-shadow:inset 0 0 6px rgba(23,201,158,.5)}

